Compare Redragon COVE K733 vs Epomaker EK21 Differences Side by Side

This comparison is for users choosing a compact mechanical numpad to complement a TKL or 60% keyboard. Both the Redragon K733 and Epomaker EK21 offer tri-mode connectivity, gasket mounts, and hot-swap sockets at a similar price, making the decision challenging. The core trade-off is between the K733's unique built-in calculator display and the EK21's extensive programmability through VIA software. Your choice hinges on whether you value a standalone calculator function or the ability to fully remap every key for macros and shortcuts.

Model
	80	84	Select a keyboard to compare
Rating	0.0 stars (0 reviews)	4.6 stars (12 reviews)
Purchase Options
Main differences	Includes a Yes display Runs at a 8000 Hz polling rate Weighs about 230 g Sized at 98 x 165 x 38 mm Made with a Plastic case	Includes a No display Supports VIA configuration Features N-key rollover Runs at a 1000 Hz polling rate Equipped with a 1000 mAh battery Weighs about 200 g Sized at 29 x 138 x 93 mm Made with a ABS case Features PBT keycaps
Score	Scores Performance: 83.3 Build Quality: 74.6 Productivity: 82.9 Customizability: 79.1 Portability: 88.3	Scores Performance: 77.4 Build Quality: 76.8 Productivity: 86.7 Customizability: 82.6 Portability: 87.8
Name	Name Redragon COVE K733	Name Epomaker EK21
Release year	Release year 2025	Release year 2025
Switch Options	Switch Options Linear	Switch Options Linear
Profile	Profile Normal Profile	Profile Normal Profile
Hot Swappable	Hot Swappable	Hot Swappable
Layout Size	Layout Size Numpad	Layout Size Numpad
Layout Standard	Layout Standard ANSI	Layout Standard ANSI
Layout Ergonomics	Layout Ergonomics Normal	Layout Ergonomics Normal
Knob Support	Knob Support	Knob Support
Display Support	Display Support	Display Support
Mac/Win Support	Mac/Win Support	Mac/Win Support
Multi-Media Keys	Multi-Media Keys	Multi-Media Keys
USB-C	USB-C	USB-C
USB passthrough	USB passthrough	USB passthrough
Connection	Connection Bluetooth, 2.4 GHz, Wired, Wireless	Connection Bluetooth, 2.4 GHz, Wired, Wireless
Polling Rate	Polling Rate 8000 Hz	Polling Rate 1000 Hz
Battery capacity	Battery capacity -	Battery capacity 1000 mAh
Hall Effect Support	Hall Effect Support	Hall Effect Support
QMK Support	QMK Support	QMK Support
VIA Support	VIA Support	VIA Support
VIAL Support	VIAL Support	VIAL Support
N-Key Rollover	N-Key Rollover	N-Key Rollover
Rapid Trigger	Rapid Trigger	Rapid Trigger
Mount Style	Mount Style Gasket Mount	Mount Style Gasket Mount
Screw in Stabilizers	Screw in Stabilizers	Screw in Stabilizers
Sound Dampening	Sound Dampening	Sound Dampening
Backlight	Backlight Rgb	Backlight Rgb
Case Colors	Case Colors	Case Colors
Case Material	Case Material Plastic	Case Material ABS
Keycaps Material	Keycaps Material -	Keycaps Material PBT
Dimensions	Dimensions 98 x 165 x 38 mm	Dimensions 29 x 138 x 93 mm
Weight	Weight 230g	Weight 200g

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Pros and Trade-offs

Your primary need dictates the choice. If you want a numpad that doubles as a physical calculator with a screen, the Redragon K733 is the clear option, despite some quirks in its calculator logic. If you prioritize customization, want to create macros, or remap keys for specific software, the Epomaker EK21 and its VIA software support are far more capable. For most technical and creative workflows, the EK21's programmability offers greater long-term utility.

Redragon COVE K733

+Features a built-in calculator display with PC and Calculator modes.
+Higher 8000 Hz polling rate in wired mode.
+Includes five layers of noise dampening foam: PO foam, IXPE switch foam, PET sound pad, bottom socket foam, and silicone pad.
+Comes with an integrated wrist rest.
+Packaging includes a braided USB-C cable.

−Calculator mode has non-standard operation precedence, as noted in user reviews.
−Screen and backlight can turn off during inactivity, potentially causing missed first keystrokes.
−Includes a '00' key that some users find less useful than a larger '0' key.

Epomaker EK21

+Fully programmable via VIA software for key remapping and macros.
+Built with a polycarbonate plate and PBT dye-sublimated keycaps.
+Specifies a 1000mAh battery capacity.
+Includes three layers of sound dampening: Poron foam, sandwich foam, and an IXPE switch pad.
+Packaging includes a keycap/switch puller, an extra 'Back' keycap, and a 2.4GHz dongle.

−Lower 1000 Hz polling rate in wired/2.4G mode.
−No built-in screen or display.
−Some user reviews report issues with VIA JSON files or firmware functionality.

Which Keyboard Is Better for Your Needs?

The Epomaker EK21 is the more versatile tool for customizable workflows, winning for Programming, Modding, and Content Creation due to VIA software. The Redragon K733 takes the edge for Gaming with its higher polling rate and wrist rest. For Office use, it's a tie between the K733's calculator and the EK21's macro potential. Travelers will appreciate the EK21's slightly lighter and more compact form factor.

GamingRedragon COVE K733

•Higher 8000 Hz polling rate for potentially lower latency.
•Includes an integrated wrist rest for comfort during long sessions.
•Vendor description mentions a 'SEND' button for calculator mode, which could be mapped for in-game actions.

OfficeTie

•Both offer tri-mode wireless connectivity for desk flexibility.
•Both are compatible with Windows and macOS.
•The K733's calculator screen is useful for quick math, while the EK21's programmability can streamline repetitive office tasks.

ProgrammingEpomaker EK21

•VIA software support allows for extensive key remapping and macro creation for coding shortcuts.
•Includes PBT keycaps for better long-term durability against shine.
•Product listing confirms N-Key Rollover for accurate simultaneous key presses.

TravelEpomaker EK21

•Lighter weight at 200g compared to 230g.
•Smaller footprint dimensions (29 x 138 x 93 mm vs 98 x 165 x 38 mm).
•Includes a protective case according to the vendor description.

ModdingEpomaker EK21

•VIA support provides firmware-level customization beyond physical mods.
•Specifies a polycarbonate plate and pre-lubed, finely-tuned stabilizers.
•Vendor lists three specific foam layers for sound dampening: Poron bottom, sandwich foam, and IXPE switch pad.

Content CreationEpomaker EK21

•VIA programmability is ideal for mapping complex shortcuts for video or photo editing software.
•Aluminum alloy knob can be customized for timeline scrubbing or brush size adjustments.
•PBT dye-sublimated keycaps offer more durable legends for heavy use.